JP5237164B2 - ろ過膜の洗浄方法 - Google Patents
ろ過膜の洗浄方法 Download PDFInfo
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- JP5237164B2 JP5237164B2 JP2009079813A JP2009079813A JP5237164B2 JP 5237164 B2 JP5237164 B2 JP 5237164B2 JP 2009079813 A JP2009079813 A JP 2009079813A JP 2009079813 A JP2009079813 A JP 2009079813A JP 5237164 B2 JP5237164 B2 JP 5237164B2
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- 239000012528 membrane Substances 0.000 title claims description 126
- 238000001914 filtration Methods 0.000 title claims description 75
- 238000000034 method Methods 0.000 title claims description 50
- 238000004140 cleaning Methods 0.000 title claims description 39
- 239000000243 solution Substances 0.000 claims description 131
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 57
- 229910001868 water Inorganic materials 0.000 claims description 57
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 51
- 238000007654 immersion Methods 0.000 claims description 50
- 150000007524 organic acids Chemical class 0.000 claims description 43
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 42
- 150000007522 mineralic acids Chemical class 0.000 claims description 39
- 239000007800 oxidant agent Substances 0.000 claims description 32
- 238000007598 dipping method Methods 0.000 claims description 29
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 25
- 230000001590 oxidative effect Effects 0.000 claims description 22
- 229910052742 iron Inorganic materials 0.000 claims description 21
- 239000007864 aqueous solution Substances 0.000 claims description 20
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 16
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 16
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 15
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 15
- 239000000919 ceramic Substances 0.000 claims description 13
- 238000005374 membrane filtration Methods 0.000 claims description 12
- 239000005416 organic matter Substances 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 4
- 239000000126 substance Substances 0.000 description 25
- 230000035699 permeability Effects 0.000 description 17
- 238000005406 washing Methods 0.000 description 17
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 13
- 239000011575 calcium Substances 0.000 description 13
- 229910052791 calcium Inorganic materials 0.000 description 13
- 230000008569 process Effects 0.000 description 11
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 9
- 239000011777 magnesium Substances 0.000 description 9
- 229910052749 magnesium Inorganic materials 0.000 description 9
- 230000015271 coagulation Effects 0.000 description 8
- 238000005345 coagulation Methods 0.000 description 8
- 239000013535 sea water Substances 0.000 description 7
- 239000002253 acid Substances 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 6
- 238000010828 elution Methods 0.000 description 6
- 238000003860 storage Methods 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 238000001223 reverse osmosis Methods 0.000 description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 239000000701 coagulant Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000004611 spectroscopical analysis Methods 0.000 description 3
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 2
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 229910052785 arsenic Inorganic materials 0.000 description 2
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 2
- 238000011001 backwashing Methods 0.000 description 2
- 239000012267 brine Substances 0.000 description 2
- 229910001424 calcium ion Inorganic materials 0.000 description 2
- 239000013522 chelant Substances 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 239000012510 hollow fiber Substances 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 239000010842 industrial wastewater Substances 0.000 description 2
- 229910001425 magnesium ion Inorganic materials 0.000 description 2
- 238000001471 micro-filtration Methods 0.000 description 2
- 239000008239 natural water Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 229920002239 polyacrylonitrile Polymers 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 238000007781 pre-processing Methods 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 238000000108 ultra-filtration Methods 0.000 description 2
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 150000003457 sulfones Chemical class 0.000 description 1
- 239000013076 target substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Description
塩化第二鉄を添加した海水をろ過して閉塞した孔径0.1μmのセラミック膜(A〜C)を、クエン酸水溶液(濃度:1重量%、pH2.5)に960分浸漬した後、塩酸溶液(濃度:4.0重量%、pH:1.0)に浸漬液のpHが常に2以下となるように適宜浸漬液を交換しながら120分以上浸漬した。その後、次亜塩素酸ナトリウム水溶液(有効塩素濃度:0.4重量%)に960分浸漬した。そして、浸漬後の各溶液中の鉄、カルシウム、マグネシウム濃度をJIS K0101に準拠してICP発光分光分析法により測定した。また、浸漬後の次亜塩素酸ナトリウム水溶液中の有機物濃度を上水試験方法 VI-1 22.2に準拠して燃焼酸化法により測定した。結果を表1に示す。更に、閉塞直後、クエン酸水溶液浸漬後(クエン酸洗浄後)、塩酸溶液浸漬後(HCl洗浄後)および次亜塩素酸ナトリウム水溶液浸漬後(次亜洗浄後)の各状態の膜に対して純水を透過させて比透水能を評価した。結果を図2に示す。なお、膜A〜Cは同一ろ過条件で閉塞した複数の膜から3つをランダムに抽出したものであり、実施例1では膜Aを、実施例2では膜Bを、実施例3では膜Cを用いた。
塩化第二鉄を添加した海水をろ過して閉塞した孔径0.1μmのセラミック膜(D〜H)に対し、クエン酸水溶液(濃度:1.0重量%、pH2.5)への浸漬(960分)と、次亜塩素酸ナトリウム水溶液(有効塩素濃度:0.4重量%)への浸漬(960分)とを交互に繰り返し行った。そして、閉塞直後、クエン酸水溶液浸漬後(クエン酸洗浄)および次亜塩素酸ナトリウム水溶液浸漬後(次亜洗浄)の各状態の膜に対して純水を透過させて比透水能を評価した。結果を図3に示す。なお、膜D〜Hは実施例1〜3と同一のろ過条件で閉塞した複数の膜から5つをランダムに抽出したものであり、比較例1〜5はそれぞれ膜D〜Hに対応する。
2 凝析槽
3 凝集槽
4 セラミック膜
5 アルカリ剤注入手段
6 凝集剤注入手段
7 撹拌機
8 撹拌機
10 前処理装置
Claims (4)
- 塩化第二鉄が添加された高硬度原水を被処理水とした膜ろ過処理に用いられるろ過膜の洗浄方法であって、
ろ過膜を、鉄に対してキレート作用を発揮する有機酸溶液に浸漬する有機酸溶液浸漬工程と、
ろ過膜を無機酸溶液に浸漬して硬度成分を溶出させる無機酸溶液浸漬工程と、
ろ過膜を酸化剤溶液に浸漬して有機物を洗浄する酸化剤溶液浸漬工程と、
を含み、
前記無機酸溶液浸漬工程および前記有機酸溶液浸漬工程を、前記酸化剤溶液浸漬工程より前に行い、
前記有機酸溶液浸漬工程を、前記無機酸溶液浸漬工程より前に行う、ろ過膜の洗浄方法。 - 前記ろ過膜がセラミック製のろ過膜である、請求項1に記載のろ過膜の洗浄方法。
- 前記有機酸溶液浸漬工程が、温度40〜100℃の有機酸溶液にろ過膜を浸漬する工程であり、
前記無機酸溶液浸漬工程が、温度40〜100℃の無機酸溶液にろ過膜を浸漬する工程であり、
前記酸化剤溶液浸漬工程が、温度40〜100℃の酸化剤溶液にろ過膜を浸漬する工程である、請求項2に記載のろ過膜の洗浄方法。 - 前記有機酸溶液がクエン酸水溶液であり、前記無機酸溶液が塩酸溶液であり、前記酸化剤溶液が次亜塩素酸ナトリウム水溶液である、請求項1〜3の何れかに記載のろ過膜の洗浄方法。
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JP5237164B2 true JP5237164B2 (ja) | 2013-07-17 |
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Families Citing this family (3)
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CA2840475A1 (en) * | 2011-06-29 | 2013-01-03 | Toray Industries, Inc. | Washing method for separation membrane module |
WO2019142945A1 (ja) | 2018-01-22 | 2019-07-25 | 旭化成株式会社 | 部材の再生方法及び海水の淡水化方法 |
CN114956312A (zh) * | 2022-04-07 | 2022-08-30 | 天津美天水环境科技有限公司 | 一种含醛废水mbr系统膜清洗及预防结垢的方法 |
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JPH084728B2 (ja) * | 1991-10-21 | 1996-01-24 | アタカ工業株式会社 | 膜モジュールの洗浄方法 |
JPH09313902A (ja) * | 1996-05-28 | 1997-12-09 | Kubota Corp | 浸漬型セラミック膜分離装置の薬品洗浄方法 |
JP3462975B2 (ja) * | 1997-07-04 | 2003-11-05 | 株式会社荏原製作所 | 除濁用膜モジュールのろ過逆洗方法 |
JP3405911B2 (ja) * | 1997-12-25 | 2003-05-12 | 株式会社荏原製作所 | 流量および圧力変動による内圧型除濁用膜モジュールの逆洗方法 |
JP4497406B2 (ja) * | 2004-07-06 | 2010-07-07 | オルガノ株式会社 | 浸漬型膜モジュールの洗浄方法及び洗浄装置 |
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